Effect of different neutral material column density: NIR data same as Figure 4. Both panels: the red, black and gray lines show the data corrected with different plausible neutral material column densities, which are reported in the legend of the left panel. The NuSTAR data have not been re-reduced (green pentagons) because the high-energy data is only marginally affected. The lowest energy bin from the NuSTAR spectrum has been removed because it might be affected by the extinction. The models in the left panel are PLCoolγ_max type models, the SCC-SSC type models are plotted on the right, and the color indicates the respective data set fitted.